XML 65 R47.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Fair Value Measurements - Schedule of Investments Measured at Fair Value on a Recurring Basis (Details) $ in Thousands | Dec. 01, 2018 USD ($)
--- | ---
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
CDs | $ 5,300

X
- Definition Bank Time Deposits, Fair Value Disclosure + References No definition available. + Details
Name: | rell_BankTimeDepositsFairValueDisclosure
Namespace Prefix: | rell_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |